Define terms elasticity, plasticity, modulus of elasticity, youngs modulus

 Elasticity:

• A property of a material that allows it to return to its original shape after being deformed.
• The material can be stretched or compressed, but will go back to its original shape once the force is removed.
• Example: A rubber band is elastic because it can be stretched and then returns to its original shape.

Plasticity:

• A property of a material to undergo permanent deformation without breaking.
• The material can be stretched or compressed, but will not return to its original shape once the force is removed.
• Example: Playdough is plastic because it can be shaped and molded, but will retain its new shape.
  

Modulus of Elasticity:

• A measure of a material's ability to withstand deformation while remaining elastic.
• It is used to determine how much a material can be stretched or compressed without becoming plastic.
• The higher the modulus of elasticity, the more stiff and rigid the material is.

Young's Modulus:

• The ratio of the stress applied to a material to the resulting strain.
• Used to measure the stiffness of a material.
• The higher the value of Young's modulus, the stiffer and stronger the material is.